Toyota 2003 Prius Owner's Manual page 10

QUALITY GASOLINE
Automotive manufacturers in the U.S., Eu-
rope and Japan have developed a specifica-
tion for quality fuel named World–Wide
Fuel Charter (WWFC) that is expected to
be applied world wide. The WWFC consists
of three categories that depend on required
emission levels. In the U.S., category 3 has
been adopted. The WWFC improves air
quality by providing for better emissions in
vehicle fleets, and customer satisfaction
through better vehicle performance.
CLEANER BURNING GASOLINE
Cleaner burning gasoline, including refor-
mulated gasoline that contains oxygenates
such as ethanol or MTBE is available in
many areas.
Toyota recommends the use of cleaner
burning gasoline and appropriately blended
reformulated gasoline. These types of gas-
oline provide excellent vehicle
mance, reduce vehicle emissions, and im-
prove air quality.
OXYGENATES IN GASOLINE
Toyota allows the use of oxygenate blended
gasoline where the oxygenate content is up
to 10% ethanol or 15% MTBE. If you use
gasohol in your Toyota, be sure that it has
an octane rating no lower than 87.
Toyota does not recommend the use of
gasoline containing methanol.
GASOLINE CONTAINING MMT
Some gasoline contain an octane en-
hancing additive called MMT (Methylcy-
clopentadienyl Manganese Tricarbonyl).
Toyota does not recommend the use of
gasoline that contains MMT. If fuel con-
taining MMT is used, your emission con-
trol system may be adversely affected.
The Malfunction Indicator Lamp on the in-
strument cluster may come on. If this hap-
pens, contact your Toyota dealer for ser-
vice.
perfor-
GASOLINE QUALITY
In a very few cases, you may experience
driveability problems caused by the partic-
ular gasoline that you are using. If you
continue to have unacceptable driveability,
try changing gasoline brands. If this does
not rectify your problem, then consult your
Toyota dealer.
NOTICE
z Do not
use gasohol other
stated above. It will cause fuel sys-
tem damage or vehicle performance
problems.
z If drivability problems are encoun-
tered (poor hot starting, vaporizing,
engine knock, etc.), discontinue its
use.
z Take care not to spill gasohol dur-
ing refueling. Gasohol may cause
paint damage.
than
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